"Not only do they keep telling each other how much they care about each other, but they still have their wedding picture up four years after the wedding," our reader explains. "One particularly nauseating segment mentions how they like to profess their love online just like how they met. Of course, he was married at the time. Funny how that doesn't come up."

"Sorry if you have to keep telling everyone," our reader moans. "Who are you trying to convince?"

Ah, if that isn't the truth. At least we know they're certainly not trying to convince the spelling or grammar police. They know that's a battle they can't win. As for the guy's ex-wife? Let's hope she just sticks to Twitter.

If you find an example of a particularly annoying, funny or weird thing that couples or singles post online—whether it be on Facebook, Twitter, YouTube, Craigslist or another site—we'd love to see it! Send your submissions to Fail@YourTango.com. You won't regret it, but the offending person will!

2. Clear Up The Gift-Giving Issue

If you're confused about whether or not you guys are buying each other something, just ask! Don't assume he's not going to get you a gift, because if he does and you don't have anything for him, you're going to feel really bad.

And if you're not sure what's appropriate to spend, bring that into the conversation also. It's better to come to an agreement together than to just wing it on your own.

3. Get His Parents Gifts If It Feels Appropriate

If you two just started dating, you haven't met them yet, and you're not going to be spending the holidays together, you probably don't have to get his parents anything.

But if you've met them even one or two times, you should buy them a little something. It could be as simple as a nice bottle of wine or a pretty bouquet of flowers — the point is, it will win you major points and show that you're thinking of them.